Here's the horizontal tube pair…

… two large 22'000μF Rubycon caps, four tall copper coils…

… and an alley of voltage regulators.

A bird's eye view on the power supply shows high parts density without the Z10's toroidal transformer but two custom-wound inductors…

… whilst doing the same swoop over the output stage reiterates how alien and divorced from textbooks David Berning's tube output stage is.